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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Sain Peternakan Indonesia Jurnal Peternakan Indonesia JITRO (Jurnal Ilmiah dan Teknologi Peternakan Tropis) Logista: Jurnal Ilmiah Pengabdian Kepada Masyarakat Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Rambideun : Jurnal Pengabdian Kepada Masyarakat Stock Peternakan Andalasian Livestock
Riesi Sriagtula
Fakultas Peternakan, Universitas Andalas
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Economics, Econometrics & Finance Education Immunology & microbiology Medicine & Pharmacology Public Health Social Sciences Veterinary Other

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Sosialisasi Manajemen Budidaya Sapi Indukan pada Kelompok Tani Harapan Sejahtera Riesi Sriagtula; Yetmaneli; Ida Indrayani
Warta Pengabdian Andalas Vol 31 No 4 (2024)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.31.4.723-730.2024

Abstract

Community service activities were designed to enhance the productivity of breeding cattle through the socialization of breeding cattle cultivation management at the Harapan Sejahtera Farmers Group in Padang City. The methods used included surveys, counseling, discussions, and assistance applying breeding cattle cultivation management. However, the key to enhancing the insight and skills of farmers in implementing cattle breeding management, such as pens and feeding, was the comparative study and a short internship for two days at CV. Andalas Farm, a beef cattle farming business. This practical learning approach provided farmers with firsthand experience and insight into modern maintenance techniques, including pen management and feeding. Innovation at CV. Andalas Farm, which processes sweet corn harvesting waste into silage as a source of green fodder to replace grass, has increased the skills of farmers. The activities increased farmers' knowledge and skills about cattle farming management, especially pen and feed management.
Karakteristik Fisik Ransum Pelet Broiler berbasis Biji Sorgum Manis (Sorghum bicolor L. Moench) Amizar, Robi; Ratna, Aulia; Rusli, Ridho Kurniawan; Sriagtula, Riesi; Montesqrit, Montesqrit
STOCK Peternakan Vol 5, No 2 (2023): Stock Peternakan
Publisher : Universitas Muara Bungo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36355/sptr.v5i2.1130

Abstract

Penelitian ini bertujuan untuk menguji kualitas fisik (berat jenis, sudut tumpukan, kerapatan tumpukan, kerapatan pemadatan tumpukan, kadar air, dan ketahanan benturan) dari ransum pelet broiler berbasis sorgum manis (Sorghum bicolor L. Moench). Metode Penelitian yang digunakan adalah metode eksperimen menggunakan Rancangan Acak Lengkap (RAL) dengan 5 perlakuan dan 4 ulangan. Perlakuan pada penelitian ini adalah penggantian jagung dengan sorgum dalam ransum pelet broiler. Perlakuan tersebut adalah P1 (ransum tanpa mengandung sorgum), P2 (ransum dengan imbangan jagung dan sorgum 4 : 1), P3 (ransum dengan imbangan 1 : 1), P4 (ransum dengan imbangan 1 : 4), dan P5 (ransum menggantikan 100% jagung dengan sorgum). Hasil analisis ragam menunjukkan bahwa penggunaan sorgum dengan imbangan yang berbeda dalam ransum pelet ayam pedaging berpengaruh nyata (P0,05) dan berpengaruh tidak nyata (P0,05) terhadap berat jenis, sudut tumpukan, kerapatan tumpukan, kerapatan pemadatan tumpukan, kadar air dan ketahanan benturan. Dari penelitian ini didapatkan pengaruh formulasi ransum yang berbeda berbasis biji sorgum manis terbaik terdapat pada perlakuan P2, yakni ransum dengan imbangan jagung  dan sorgum 4 : 1. Perlakuan P2 termasuk kategori pelet yang baik dengan kadar air 10,88%, berat jenis 0,359 kg/liter, sudut tumpukan 35,790, kerapatan tumpukan 515,25 gram/liter, kerapatan pemadatan tumpukan 586,69 gram/ml, serta ketahanan benturan 98,52%.
Agronomic Characteristics and Forage Yield of Brown Midrib (BMR) Sorghum in The Ratoon System Riesi Sriagtula; Qurrata Aini; Mardhiyetti; Yetmaneli; Gusri Yanti; Le Huu Phuoc
Andalasian Livestock Vol. 3 No. 1 (2026): ALive
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/alive.v3.n1.p17-24.2026

Abstract

Brown Midrib (BMR) sorghum is a mutation-derived variety with low lignin and high non-structural carbohydrate content, potential as a ruminant forage. The ratoon system allows for repeated harvesting without replanting, thus providing an efficient forage supply. This study aimed to evaluate the agronomic characteristics and biomass productivity of BMR mutant sorghum in primary plants, the first and second ratoon. The study was conducted experimentally using a randomized block design with three treatments (primary, first ratoon, and second ratoon plants) and four replications. The parameters observed included agronomic components (plant height, number of tillers, stem diameter, and leaf size), stem sugar value (Brix), proportion of plant structures (stems, leaves, and panicles), panicle production, forage production, and livestock carrying capacity. The results showed that plant height was not significantly different (P>0.05) between primary and ratoon plants, while stem diameter and leaf size decreased gradually from the first to the second ratoon. The Brix value showed a highly significant difference (P<0.01), with the highest value in the first ratoon and the lowest in the second ratoon. The proportion of stems and leaves decreased in the second ratoon, whereas the proportion of panicles and panicle production increased significantly (P<0.01). The highest forage production was obtained in the second ratoon at 52.08 tons/ha, while the total production of the three harvests reached 112.28 tons/ha with a carrying capacity of 8.8 AU/ha. From the results of this study, it can be concluded that the ratoon system does not reduce the biomass productivity of BMR mutant sorghum and can maintain agronomic quality until the second ratoon. With its high production potential and good regrowth ability, BMR mutant sorghum is worthy of development as a sustainable forage source in ruminant livestock farming systems.
The Impact of Defoliation on the Age of King Grass (Pennisetum purpuphoides) on Ultisol Soil Aini, Qurrata; Jamarun, Novirman; Sriagtula, Riesi; Suyitman, Suyitman; Yanti, Gusri
Jurnal Sain Peternakan Indonesia Vol 21 No 1 (2026)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jspi.id.21.1.18-23

Abstract

King grass production can be increased by extending the defoliation period because king grass will not flower unless it is planted in cold (subtropical) areas, so its vegetative phase is longer. This study aims to determine the optimal defoliation age in terms of growth, production, and chemical composition of king grass (Pennisetum purpuphoides) at the first harvest on ultisol soil. Treatments include A: defoliation at 60 days after planting (DAP); B: 90 DAP; C: 120 DAP. Parameters observed included plant growth, production, nutrient and fibre fractions, and total digestible nutrient (TDN). This research was conducted experimentally using a group-randomized design (GRD) with three treatments and four replications. The results showed that treatments for plant height, number of tillers, fresh production, dry matter (DM), and fibre fraction content had a highly significant effect (P < 0.01). In contrast, the treatments showed a non-significant effect (P>0.05) on silica and TDN. Based on the results, it can be concluded that the optimum growth, production, and quality of king grass cultivated on ultisol soil is at the age of 90 DAP defoliation, with fresh production of 60.28 ton/ha/harvest, crude protein is 11.68%, lignin is 8.88%, and TDN is 61,23%.
EFFECTS OF PHOSPHATE-SOLUBILIZING BACTERIA FROM PROBIOTIC AND PHOSPHORUS FERTILIZATION ON JUICE CHARACTERISTICS OF BROWN MIDRIB SORGHUM (Sorghum bicolor L. MOENCH) Riesi Sriagtula; Mardhiyetti Mardhiyetti; Gusri Yanti; James Hellyward
BIOTROPIA Vol. 32 No. 3 (2025): BIOTROPIA Vol. 32 No. 3 December 2025
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.3.2240

Abstract

HIGHLIGHTS- Bacillus sp. probiotics can replace 100% inorganic phosphate fertilizer.- Sorghum stem diameter strongly correlates with juice volume.- Juice yield was not affected by phosphorus dose or Bacillus sp. colony size.- Sorghum juice sugar content reached 11.77–12.75% Brix.- Phosphate-solubilizing bacteria improved phosphorus availability in ultisol. ABSTRACTThis study was conducted to observe the effects of phosphate-solubilizing bacteria (PSB) combined with different phosphorus fertilizer levels on the juice characteristics of the BMR sorghum mutant line. The research was carried out at the Edufarm of the Faculty of Animal Science, Andalas University, Padang, using a randomized block design (RBD) with four treatments and four replications. The treatments were as follows: P0 = Urea + KCl + 0% TSP + PSB; P1 = Urea + KCl + 50% TSP + PSB; P2 = Urea + KCl + 75% TSP + PSB; and P3 = Urea + KCl + 100% TSP (control). The PSB used was obtained from Waretha Probiotics, consisting of Bacillus sp. culture at a dose of 10 mL per planting hole, equivalent to 10⁷ cfu/g. The parameters measured were sugar content (%Brix), volume of stem juice (mL), and the correlation of various parameters with stem juice volume. The results showed that the application of probiotic Bacillus sp. and different dosages of phosphorus fertilizer did not result in significant differences for all parameters (P > 0.05). Sugar content and juice volume ranged from 11.78 to 12.75 (%Brix) and 188.75 to 218.5 (mL/stem), respectively. The correlation coefficient analysis indicated significant positive correlations between stem diameter (r = 0.575*) and fresh stem weight (r = 0.504*) with the volume of sorghum stem juice. It was concluded that the application of PSB from Bacillus sp. can replace phosphorus fertilizer, producing sugar content and juice yield comparable to the 100% P fertilizer treatment. A correlation was observed between stem diameter and fresh stem weight with stem juice volume. PSB was found to play a crucial role in increasing phosphate availability to plants. The implications of this research include the potential production of forage sorghum with high Brix content for ruminant energy and Water-Soluble Carbohydrates (WSC) for silage production.
Vegetative Growth and Potential of Turi (Sesbania grandiflora) as Forage under PGPR Application on Ultisol Soil Mardhiyetti; Sriagtula, Riesi; Sowmen, Simel; Aini, Qurrata; Martaguri, Imana
Andalasian Livestock Vol. 3 No. 1 (2026): ALive
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/alive.v3.n1.p88-95.2026

Abstract

Turi (Sesbania grandiflora) is a high-protein forage legume with significant potential to support ruminant nutrition in tropical regions. This study aimed to evaluate the effect of Plant Growth-Promoting Rhizobacteria (PGPR; Rhizomax) on the vegetative growth of turi as an indicator of forage productivity in ultisol soil. The experiment was conducted using a Completely Randomized Design with five treatments and five replicates: P0 (without PGPR), P1 (100 ml/plant), P2 (200 ml/plant), P3 (300 ml/plant), and P4 (400 ml/plant). The measured variables included plant height, stem diameter, and number of leaf stalks. Data were analyzed using analysis of variance (ANOVA), followed by Duncan’s Multiple Range Test when appropriate. The results showed that different doses of PGPR had no significant effect (P>0.05) on any of the observed parameters during the early vegetative phase. This indicates that PGPR application did not enhance the early growth performance or potential forage biomass production of turi under the conditions of this study. The lack of response is likely associated with the early growth stage, where external nutrient supplementation is not critical for plant development. These findings suggest that the effectiveness of PGPR on Turi as a forage crop may require longer observation periods or integration with additional nutrient sources to be fully realized.
Pengaruh Interval Defoliasi terhadap Produktivitas dan Kualitas Indigofera zollingeriana di BPTU HPT Padang Mengatas Provinsi Sumatera Barat: bahasa indonesia Yulia Heniwati; Novirman Jamarun; Riesi Sriagtula; Zaitul Ikhlas
Jurnal Peternakan Indonesia (Indonesian Journal of Animal Science) Vol 28 No 1 (2026): Jurnal Peternakan Indonesia
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jpi.28.1.1-10.2026

Abstract

Indigofera zollingeriana berpotensi sebagai sumber protein pengganti konsentrat, namun kualitas nutrisinya sangat dipengaruhi oleh interval defoliasi. Semakin tua umur tanaman, kandungan serat meningkat sementara protein dan kecernaan menurun, sehingga perlu ditentukan waktu defoliasi yang optimal. Penelitian ini bertujuan untuk mengetahui pengaruh interval defoliasi terhadap kualitas nutrisi Indigofera zollingeriana. Metode yang digunakan pada penelitian ini adalah eksperimen dengan Rancangan Acak Kelompok (RAK) tiga perlakuan interval defoliasi yaitu T1 = interval defoliasi 50 hari, T2 = interval 65 hari, dan T3 = interval 80 hari, masing-masing dengan lima ulangan. Parameter yang diamati kandungan bahan kering, bahan organik, protein kasar, lemak kasar, serat kasar, evaluasi kecernaan secara in-vitro meliputi kecernaan bahan kering dan kecernaan bahan organik. Data yang diperoleh dianalisis menggunakan Analisis of Varience (ANOVA) dan perbedaan antar perlakuan menggunakan uji lanjut Duncan Multiple Test (DMRT). Hasil analisis ragam menunjukkan bahwa perlakuan memberikan pengaruh yang signifikan (P<0,05) terhadap kandungan bahan kering, bahan organik, protein kasar, lemak kasar, serat kasar, kecernaan bahan kering dan bahan organik. Hasil penelitian menunjukkan bahwa interval defoliasi 50 hari memberikan kandungan protein kasar tertinggi (27,17%) dan nilai kecernaan bahan kering (64,79%). Berdasarkan hasil penelitian dapat disimpulkan bahwa interval defoliasi 50 hari memberikan hasil kualitas I. zollingeriana terbaik sebagai sumber protein yang berasal dari hijauan di BPTU HPT Padang Mengatas.
Co-Authors - Montesqrit Afriani Sandra Aronal Arief Putra D. Novia Elly Roza Febryon Tri Intano Gusri Yanti Gusri Yanti Hilda Susanty Ida Indrayani Ida Indrayani James Hellyward Laksono Trisnantoro Le Huu Phuoc Mardhiyetti Mardhiyetti Mardhiyetti Mardhiyetti Mardhiyetti Martaguri, Imana Neti, Fitra Novirman Jamarun Qurrata Aini QURRATA AINI Qurrata Aini Ratna, Aulia Rusdimansyah Rusdimansyah Rusli, Ridho Kurniawan Simel Sowmen Suyitman Suyitman Yanti, Gusri Yatmanelli Yatmanelli Yetmaneli Yetmaneli Yetmaneli Yetmaneli, Yetmaneli Yetmaneli, Yetmaneli Yulia Heniwati Zaitul Ikhlas